Perhaps you should try some spelling variations:
thieu khang » chieu khong
thieu quang » hieu quang, thien quan, trien quang
canh manh » lanh manh, canh tranh, cach mang
cua trong » cua truong, cua trung, qua trong
manh cua » doanh cua, ban cua
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu khang) OR (thieu quang)) - canh manh cua trong ((cong dan) OR (cong tan)) hang va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu khang) OR (thieu quang)) - canh manh cua trong ((cong dan) or (cong tan)) hang va~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu khang) OR (thieu quang)) - canh manh cua trong ((cong dan) or (cong tan)) hang va*.